Charging Port Cleaning

I've never really heard of an Apple Store doing that. Maybe an Apple Authorized Service Provider might, but that's not an official service authorized by Apple. I haven't seen any official Apple Support articles on cleaning a Lightning port, but there are many 3rd party instructions on how to do it and you might consider one that seems like you'd be comfortable doing.

Call them, but I’d expect most to offer this service. You’ll want to ask about the cost.